For use with Makita Couple Shaft Power Heads. 20" double-sided blade with higher blade speed (4,200 spm) for efficient cutting. Commercial duty gear case with tip guard engineered for improved durability. Compact design with less weight at only 6.5 lbs. M M4® 4-stroke engine. Overall length 44". Includes shear blade and blade cover. Blade Lgth In=20 This item cannot be shipped to APO/FPO addresses. Please accept our apologies